How to install Linux instead of factory android on an unnamed board with Allwinner A20 without usb?

Question

linux

There is a nameless scarf with Allwinner A20 and FORESEE 8G on board.

photo boards

Initially, it had android 4, but it became necessary to replace it with some kind of Linux derivative.
As a result, only linaro was able to roll there via the SD card in the mode

command line.

There is no obvious way to connect this board to a desktop computer via USB, like a regular cubieboard / pi / arduino.

I tried many options, uploading them to the SD card using Etcher.
For example:
Cubian-desktop-x1-a20-hdmi.img : on startup it stops at the logo in the middle of the screen and that's it.
cb-a20-lubuntu-desktop-card-v105.img and linaro-desktop-cb2-20171113-card-hdmi-V1.1.img : loaded from the card, but do not have the obvious ability to install in the NAND memory of the board.
cb2-lubuntu-superpi3-nand.img and ct-lubuntu-server-nand-v2.0.img : in them, Etcher, and, as a result, the scarf itself, do not see the boot record, so they do not boot at all, the sd card is ignored and the installed linaro is loaded.

How to be and what to do? Where can I dig further, or am I just doing something wrong initially?
Help needed)

Answer 1

Maybe these will fit?
https://sysadmin.pm/portable-qemu/
https://sysadmin.pm/takeover-sh/